Noun. 1. synergy-the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects. synergism.
Cayenne pepper cranks the sauce up to 800 Scoville units of heat compared to Taco Bell's Fire Sauce at 500 Scoville units, which makes this the hottest stuff you can get at the chain. Now, with this secret formula, you can adjust the heat up or down to your preference just by playing with the amount of cayenne you add.
The number of dilutions is called the Scoville rating; the relatively mild Jalapeno ranges from around 2,500-6,000, whereas the hottest chilli in the world, the  Moruga Scorpion, has produced peppers testing over 2,000,000.